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Electrodeposition of polyaniline on self-assembled monolayers on graphite for the voltammetric detection of iron(II)

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dc.contributor.authorCamacho, Cláudia S.
dc.contributor.authorMesquita, José C.
dc.contributor.authorRodrigues, João
dc.date.accessioned2019-06-25T11:08:11Z
dc.date.available2019-06-25T11:08:11Z
dc.date.issued2016
dc.description.abstractConducting polyaniline (PANI) prepared by potentiodynamic electropolymerization on unmodified graphite, and on graphite modified by self-assembled monolayers (SAMs) of 3-mercapto-1-propanesulfonic acid sodium salt (MPS) or 4-aminothiophenol (4-ATP), has been studied by cyclic voltammetry and electrochemical impedance. For the various PANI-modified electrodes, the electropolymerization behaviour of aniline is not significantly different, as well as the polyaniline redox behaviour. Despite that, the films electrodeposited on self-assembled seem to be thinner than those directly obtained on graphite. The 4-aminothiophenol self-assembled exerts more influence on polyaniline, particularly through a relative enhancement of the redox couple benzoquinone/hydroquinone. It was verified by cyclic voltammetry that Fe(II) is detected with the several PANI-modified electrodes. The comparison of the Fe(II) redox voltammetry on the different PANI-modified electrodes shows that does not significantly depend on of the modified electrode used. Complementarily, there is a relative increase in current of the redox couple Fe(II)/Fe(III) on polyaniline compared to that observed in graphite, suggesting an electrocatalytic process. However, that effect may be explained by an increase in surface area. Nevertheless, our results have shown clearly, with polyaniline, an increase in the reversible nature of the voltammetry of the redox couple Fe(II)/Fe(III).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCamacho, C. S., Mesquita, J. C., & Rodrigues, J. (2016). Electrodeposition of polyaniline on self-assembled monolayers on graphite for the voltammetric detection of iron (II). Materials Chemistry and Physics, 184, 261-268.pt_PT
dc.identifier.doi10.1016/j.matchemphys.2016.09.050pt_PT
dc.identifier.issn0254-0584
dc.identifier.urihttp://hdl.handle.net/10400.13/2429
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationMadeira Chemistry Research Centre
dc.subjectElectrocatalysispt_PT
dc.subjectPolyanilinept_PT
dc.subjectFe(II)/Fe(III)pt_PT
dc.subjectSelf-assembled monolayerpt_PT
dc.subjectGraphite electrodespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.subjectCentro de Química da Madeira
dc.titleElectrodeposition of polyaniline on self-assembled monolayers on graphite for the voltammetric detection of iron(II)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMadeira Chemistry Research Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FQUI%2F00674%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTM%2F098451%2F2008/PT
oaire.citation.endPage268pt_PT
oaire.citation.startPage261pt_PT
oaire.citation.titleMaterials Chemistry and Physicspt_PT
oaire.citation.volume184pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
person.familyNameCamacho
person.familyNameMesquita
person.familyNameRodrigues
person.givenNameCláudia Sofia
person.givenNameJosé
person.givenNameJoão
person.identifier.ciencia-id6C1E-7D62-56D1
person.identifier.ciencia-idA81C-620E-DD6A
person.identifier.orcid0000-0002-2668-555X
person.identifier.orcid0000-0003-4552-1953
person.identifier.ridB-6816-2008
person.identifier.scopus-author-id24360288600
person.identifier.scopus-author-id9233278800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery8503801f-2442-4c62-914e-7af5ced0c492
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